ASME B18.18:2017 pdf free download

ASME B18.18:2017 pdf free download

ASME B18.18:2017 pdf free download.Quality Assurance for Fasteners.
Iso 9001, Quality management systems — Requirements
IS(/lEC 17011, Conformity assessment — General requirements for accreditation bodies accrediting conlormity assessment bodies
ISO/lliC 17025, General requirements for the competence of testing and calibration laboratories
ISO/TS 16949, Quality management systems — Particular requirements for the application of ISO 9001 :2(X)0 for automotive production and relevant service part organizations
Publisher: International Organization for
Standardization (ISO) Central Secretariat, Chemin de Blandonnet 8, Case Postale 401, 1214 Vernier, Geneva, Switzerland (
1.3 Measuring and Testing Equipment
All inspection and testing equipment that is used for the acceptance of Categories 2, 3, and 4 fasteners shall be calibrated by a laboratory that has been accredited to lSO/IEC 17025 by an accreditation body that operates in accordance with ISO/IEC 17011. Calibration may also be conducted by an organization authorized by the original equipment manufacturer. Calibration shall be traceable to the National Institute of Standards and Technology (NIST) Standard or an equivalent national or international standard.
1.4 Terminology
For definitions of terminology not specifically defined in this Standard, refer to ASME B18.12.
1.4.1 Lot. The definition of lot is provided in ASME B18.12. In the case of fastener assemblies, such as screw and washer assemblies, the manufacturer shall maintain lot traceability for all components. A finished fastener assembly lot shall comprise a single lot of each component that makes up the final assembly.
1.5 Designation of Final Inspection Category
Prourcnwnt dtuments should indicate which category (2, 3, or 4) of final inspection is required. Examples of designation are provided under the appropriate inspection category sections of this document
2.1 Understanding the Basic Requirements
2.1.1 Sampling Acceptance Criterion. The acceptance criterion for final inspection is zero nonconformities (C =0) for all inspections. However, it should be recognized that zero nonconformities (C=0) in a sam-pling plan does not mean that the population is entirelyfree of defects.
2.2 In-Process Inspection
2.2.1 Fabricating Operations.General inspectionprocedures shall be established on the basis of engi-neering and manufacturing experience with regard tothe effort of setup,tooling, operator,machine setup,and operation on each characteristic at each processingstation. The minimum in-process requirements at eachmachine or processing station shall be as follows:
(a)Five pieces shall be visually examined for grossdefects and surface discontinuities as required by theapplicable standards.Three pieces shall be verified forpart characteristics imparted to it by that machine orprocessing station in accordance with Table 1 at thefollowing times.